Abstract
Low-rank coal (LRC) drying processes are generally categorized by operating temperature, drying environment, and type of feed or product. Within these broad categories, drying processes differ further according to the type of drying equipment and methods of quenching and stabilizing dried products. This paper focuses on the issue of the quality of products produced from a number of LRC drying processes that are commercial or have been demonstrated at a pilot-scale, including low and high temperature evaporative drying and non-evaporative processes, such as hydrothermal drying. Evaporative processes are usually the lowest cost and are preferred when the dried product is used immediately. This avoids the problems of moisture reabsorption, dust generation and spontaneous combustion associated with LRC transportation and long term storage. Hydrothermal drying followed by. low-rank coal-water fuel production is one of the most promising techniques for eliminating stability problems, while producing a value added fuel that will compete in the heavy oil market, not the steam coal market.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.